Survival analysis to assess the risk of death of patients with neuroendocrine tumors, Taiwan, 1996–2009.

aHazard ratio and 95% confidence interval were calculated using Cox proportional hazards model.bHazard ratio and 95% confidence interval were calculated using Cox proportional hazards model, adjusted for all of the variables in the table.cHead and neck includes lip and oral cavity, pharynx, larynx, nasal cavity and paranasal sinuses, middle ear, and major salivary glands; Biliary includes gallbladder and extrahepatic bile duct; Others includes anus, bone, brain, cervix, intracranial gland, kidney, labia majora, mediastinum of the heart, peritoneum, pleura, retroperitoneum, skin, testis, thymus, thyroid, urinary bladder, uterus, vagina, and site undefined.Abbreviations: CI, confidence interval; HR, hazard ratio.